I suggest you ...

Add an oppotunity to create flow maps automatically

It would be great, if your application could create interaction flow maps for user's projects. Firstly, it is very useful, when designing communicates with developers. Secondly, it is helpful, because when you create the prototype, you can see where (on which page) you can create something more convenient. Moreover, if you watch at the map, you would see all your mistakes.
So, I think, the map is indispensable thing during a prototyping. And I will look forward to this update.